Question: When was Pericles born, given that the Gregorian  date of his birth is earlier than 1584
Paraphrase: If the Gregorian date of birth of Pericles was 1584 then what is his date of birth?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q80398 p:P569 ?s . ?s ps:P569 ?obj . ?s pq:P31 wd:Q26961029 }